“Eastern Sentry will add flexibility and strength to our posture and make clear that, as a defensive alliance, we are always ready to defend,” he added.

After Russian armed drones entered its airspace, Poland has urged Nato to impose a ’no-fly zone’ over Ukraine.

Polish foreign minister said NATO should start shooting down Russian drones and missiles over Ukraine, a sentiment echoed by Zelensky and aired since the start of the war.